20785232959 has 4 divisors (see below), whose sum is σ = 21501965160. Its totient is φ = 20068500760.

The previous prime is 20785232957. The next prime is 20785232977. The reversal of 20785232959 is 95923258702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95923258702 = 2 ⋅47961629351.

It is a cyclic number.

It is not a de Polignac number, because 20785232959 - 2¹ = 20785232957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20785232957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 358366057 + ... + 358366114.

It is an arithmetic number, because the mean of its divisors is an integer number (5375491290).

Almost surely, 2^20785232959 is an apocalyptic number.

20785232959 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

20785232959 is a deficient number, since it is larger than the sum of its proper divisors (716732201).

20785232959 is an equidigital number, since it uses as much as digits as its factorization.

20785232959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716732200.

The product of its (nonzero) digits is 2721600, while the sum is 52.

The spelling of 20785232959 in words is "twenty billion, seven hundred eighty-five million, two hundred thirty-two thousand, nine hundred fifty-nine".